a mental illness that makes a person refuse to eat

gauntness

the sort of food usually eaten (by a person, community etc); the sort of food (to be) eaten by a person in order to lose (or gain) weight

abstinence from food

(an almost) complete lack of food in a region

hunger

the desire for food; any strong desire

appetite for food, other desire

the condition caused by not getting (enough of) (the right) food

poor nutrition

the state of being poor

want; extreme need, often financial

a squalid state

filth, poverty